Newt tweaks Mitt for losing to McCain

POLITICO's Ginger Gibson reports on a new line from Newt Gingrich about Mitt Romney, one that refers to his new surrogate John McCain:

Newt Gingrich is trying to challenge the notion that Mitt Romney is the most electable candidate in the GOP field.

"Why would you want to nominate the guy who lost to the guy who lost to Obama?" Newt asked a standing-room only crowd in Myrtle Beach, S.C.

Gingrich argued that the only reason people see Romney as the most electable is because he's raised the most "Wall Street money" to run advertisements.

Gingrich then challenged Romney to a 90-minute, one-on-one debate "anywhere in the state" of South Carolina on Friday night. He said they could sell $10 tickets and donate the proceeds to the charity of Romney's choosing.

"There is zero chance he'll take it," Gingrich said. "He won't debate and the reason is simple, he can't defend his record as governor."